Version, Header length
Shows Version and Header length in the IPv4 header.
Total length
Shows Total length in the IPv4 header.
DSCP/TOS
When changing the DSCP/TOS (Differentiated Service Code Point/Type of
Service) setting, it is possible to define some handling characteristics of the
datagram, originally defined in RFC 791. Other uses of the DSCP/TOS setting
are VoIP, DiffServ and ECN.
Identifier
The Identifier is mainly used for uniquely identifying fragments of an IP
datagram. When the Auto increment check box is selected, the Identifier
will be different for each sent frame.
Flags, Fragment Offset
If the MF (More Fragments) flag is set: When a packet is fragmented, all
fragments have the MF flag set except the last fragment.
If the DF (Don't Fragment) flag is set: When fragmentation is required to
route the packet, then the packet will be dropped.
RES (Reserved) must be zero (i.e. not set).
TTL
TTL (Time To Live) defines the number of 'hops' a datagram can do before it
no longer is forwarded.
Protocol
The Protocol field defines the upper/next layer protocol encapsulated in the
IP datagram. Typical values in hex are: 1 = ICMP, 6 = TCP etc.
Src IP/Dst IP
Source IP address and Destination IP address can be entered using the
format: 255.255.255.255.
When Multistream traffic is sent from one port to another, make sure that the
source address on one port is the same as the destination address on the other
port for each of the active streams. This applies both if the two ports are in one
instrument and if they are in two different instruments.
Selecting the DHCP check box located next to the Src IP field will enable the
Dynamic Host Configuration Protocol function.
Selecting the DNS check box located next to the Dst IP field changes the
field name to Hostname, allowing you to specify the domain name server.
Touching the Setup button next to the virtual Lamp in the Src IP line will
open the DHCP/DNS Setup dialog box.
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